100121113 has 4 divisors (see below), whose sum is σ = 100629540. Its totient is φ = 99612688.

The previous prime is 100121111. The next prime is 100121123. The reversal of 100121113 is 311121001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 311121001 = 97 ⋅3207433.

It can be written as a sum of positive squares in 2 ways, for example, as 92679129 + 7441984 = 9627^2 + 2728^2 .

It is a cyclic number.

It is not a de Polignac number, because 100121113 - 2¹ = 100121111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100121113.

It is not an unprimeable number, because it can be changed into a prime (100121111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253918 + ... + 254311.

It is an arithmetic number, because the mean of its divisors is an integer number (25157385).

Almost surely, 2^100121113 is an apocalyptic number.

It is an amenable number.

100121113 is a deficient number, since it is larger than the sum of its proper divisors (508427).

100121113 is an equidigital number, since it uses as much as digits as its factorization.

100121113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508426.

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 100121113 is about 10006.0538175646. The cubic root of 100121113 is about 464.3461933455.

Adding to 100121113 its reverse (311121001), we get a palindrome (411242114).

The spelling of 100121113 in words is "one hundred million, one hundred twenty-one thousand, one hundred thirteen".